Island



(Np Model.)

0 G HILL CARBON HOLDER. No. 508,314.

Patented Nov; 7, 1893.

I'lll! INVENTOH m E S S rN v n W L/k h A TTOHNE XS.

,UNITED STATES PATENT OFFICE.

CLARK C. HILL, OF NEWPORT, RHODE ISLAND.

CARBON-HOLDER.

SPECIFICATION forming part of Letters Patent No. 508,314, dated November'7, 1893. Application tlledJanuai-y 18, 1893. Serial No. 458.773. (Nomodel.)

To all whom it may concern.-

Be it known that I, CLARK C. HILL, of Newport, in the county of Newportand State of Rhode Island, have invented a new and Improved1Carbon-Holder, of which the following is a specification, referencebeing had to the annexed drawings, forming a part thereof, in whichFigure 1 is a side elevation of the upper and lower carbon holders. Fig.2 is an inverted plan view of the upper carbon holder. Fig. 3 is a planview of the lower carbon holder. Fig. 4 is a vertical transverse sectionof the upper carbon holder, the section being taken on line 44 in Fig.2; and Fig. 5 is a vertical transverse section of the lower carbonholder, taken on line 5-5 in Fig. 3.

Similar letters of reference indicate corresponding parts in all theviews.

The object of my invention is to provide carbon holders-for the upperand lower carbons of electric lamps, which will hold them in theposition of use without the necessity of employing screw clamps oradjusting screws.

My invention consists in a longitudinally slitted socket, made of springmaterial and provided with an encircling spring, the socket beingadapted to receive the end of the carbon rod and hold it axially in linewith the carbon holding rod, all as will be hereinafter more fullydescribed.

The upper carbon holder A, consists of a cylindrical socket of springmetal, bored out at the upper end and screw-threaded to receive thecarbon holding rod of the lamp. The walls of the socket are thickened atits lower extremity, and grooved circumferentially to receive thecircular spring a. The

mouth of the socket is flared to facilitate the entrance of the carbonrod B, and in the socket are formed longitudinal slits b, which renderthe sides elastic, so as to allow the socket to adapt itself to carbonrods of slightly different diameter.

. The lower carbon holder A is like the upper carbon holder, with theexception of the screw threaded portion 0, by means of which the holderis attached to the lower part of the lamp. The said screw threadedportion is of sufficient internal diameter to screw on the boss formedon the lower part of the lamp frame. The lower holder is provided withthe circular spring a, and is slotted as in the other case.

It is obvious that any desired number of slots may be formed in theholders, and that the sections of the socket formed by slotting, may bemade to clamp the carbons sufficiently for practical purposes withoutemploying the circular spring a, but I prefer the construction hereinshown and described.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- A carbon holder for electric lamps, formed of acylindrical,longitudinally slotted socket provided with thickened endsand furnished with a circumferential groove near one end, and a circularspring fitted to the circumferential groove, substantially as specified.

CLARK O. HILL. Witnesses k PALLEN S. KAULL,

WM. P. SHEFFIELD, J r.

